Boiler-setting.



PATENTED JUNE 25, 1907.

1 7 Ymw m TD IBM R RP BE .L GMIULA Bm CHARLES B. RISLEY, -OF PRINCETON, INDIANA.

BOILER-SETTING.

Specification of Letters Patent.

Patented June 25, 1907.

Application filed November 7,1906. Serial No. 342,422-

To all whom, it may concern:

Be it known that I, CHARLES B. RrsLEY, a citizen of the United States, residing at Princeton, in the county of Gibson and State of Indiana, have invented new and useful Improvements in Boiler-Settings, of which the following is a specification.

This invention relates to boiler settings, being especially directed to that portion of the setting known as the rear-arch, and has for its objects to produce a comparatively simple, inexpensive device of this character wherein smoke, gases and other products of combustion will be properly distributed to the upper and lower boiler tubes, thus insuring the entrance of a proper proportion of the heated gases into the lower tubes, and one wherein sections of the arch may be removed at will, thus to provide for proper access being had to the boiler tubes, when circumstances require.

A further object of the invention is to provide a device of this character wherein the supporting bars included in the arch structure will, without injury, be susceptible of free expansion or contraction, one wherein the bars will be firmly but detachably sustained in place and will in turn properly support the masonry of the arch.

A further object of the invention is to provide a simplified form of block especially designed and adapted for use independently or in connection with the improved bars in the formation of the arch, one which will possess the requisite amount of strength and durability, and one which may be conveniently positioned in the formation of the arch or readily removed therefrom.

With these and other objects in view, the invention comprises the novel features of construction and combination of parts more fully hereinafter described.

In the accompanying drawings Figure 1 is a perspective view of a portion of a boiler and its setting, showing the manner of applying to the latter the rear arch embodying the invention. Fig. 2 is an elevation, partly in section, showing the manner of mounting the arch-bars in the setting. Fig. 3 is a perspective view of one of the bars. Fig. 4 is a similar view of one of the blocks employed in the construction.

Referring to the drawings, 1 designates the boiler setting, in which is fixed a boiler 2 having tubes or flues 3 open at their rear ends for communication with a smoke space or chamber lrformed in the setting at the rear end of the boiler, these parts, which are conventionally shown herein, being of the usual or any appropriate construction and material and adapted in practice to perform their ordinary functions.

Arranged at the rear end of the setting over the smoke space 4 and for directing the smoke, gases and other products of combustion into the tubes 3, is a rear-arch 5 comprising a plurality of arch bars 6 designed to support the arch, which consists of masonry or a series of individual blocks or sections 7 composed of fire clay or other suitable material, the blocks, which are molded or otherwise formed, being in accordance with the invention of the shape shown and each having an upper curved face 8, a vertical upperend face. 9, a horizontal lower end face 10 and a lower face of compound curvature, which when the blocks are assembled form an upper arched portion 12 and a lower arched portion 11 for a purpose which will hereinafter appear.

Extended across the setting at the rear end of the boiler is a supporting beam 13 having suspended therefrom by means of hangers 14 a horizontal supporting member or rail 15 adapted for engagement by engaging portions or hooks 16 formed on the upper ends of the bars 6, the lower ends of which are provided with substantially L-shaped flanges 17 designed to seat upon the upper edge of the rear wall of the setting.

I am aware that certain types of boilers are provided with a man-hole in the rear boiler-head, thus rendering the use of the above-described supporting device impracticable, and I do not limit the scope of this invention to'the above-described supporting device, as the bars 6 may, for use with such boilers, be made with their upper ends having a right-angular head instead of hooks, as

shown, and for engagement with and to be supported by means of an angle-iron bar which is preferably attached to the rear boiler-head.

The bars 6, which are preferably cast but may be otherwise produced, are identical in construction and are each formed with a deep, vertical web 18 pierced by a series of transverse perforations 19 arranged at appropriately spaced intervals, and with laterally projecting, horizontal portions or flanges 20 having their outer edges notched at intervals as at 21, for a purpose which will pres ently appear,' the {bars being of compound curvature from end to end, as shown, thus adapting the flanges 20 to conform to and it the lower faces of the blocks 7 which in practice rest upon and are supported by the portions 20 of the arch bars.

In practice, the bars 6 are first arranged in appropriately spaced order over the smoke space 1, with their lower flanged ends 17 seated on the rear wall of the setting and the hooks 16 engaged with the rail 15, after which the sections or blocks 7 are seated between the rails with their lower faces resting on the portions or flanges 20 of the adjacent bars 6, it being understood in this connection that the blocks are seated loosely in place to permit of their convenient removal when cir cumstances require, and further that when the blocks are assembled side by side as in Fig. 1, they form a continuous double arch above the smoke chamber. When the arch is completed, the webs 18 of the supporting bars extend upward between the blocks 7 by which latter they are protected against the injurious action of the heat, while free ex- ;ansive and contractive action is permitted owing to the provision of the perforations 19 and notches 21, which latter obviate cracking of the horizontal portions or flanges 20 by the heat to which they are exposed. In action, the heated smoke, gases and other products of combustion arising in the chamber 4 will contact with and be deflected by the rear-arch 5 into the tubes 3, it being evident that substantially equal proportions of the products of combustion will be deflected by the arched portions 11 and 12 of the arch and directed thereby respectively into the lower and upper rows of tubes, thus insuring a proper distribution of tee heat and a consequent more uniform heating of the tubes, whereby the effective water heating surface within the boiler is materially increased.

It may be mentioned, in conclusion, that in the operation of rear-arches of ordinary form, a large proportion of the heated products of combustion pass upward into the upper rows of tubes lying above the central, horizontal row, whereby said upper tubes become highly heated while the lower rows of tubes which catch but a small proportion of the heated products remain only slightly heated and are thus rendered less effective for heating the water within the boiler. Under my improved device, the heated products are equally distributed between the up per and lower rows lying, respectively, above and below the central, horizontal row of tubes, whereby all of the tubes become ei'lectually and uniformly heated for properly'performing their functions. Thus the abovenoted objection is overcome and the effectiveness of the heating surface of the boiler measurably increased.

Having thus described my invention, what I claim is:

1. In a device of the class described, a boiler having tubes, a boiler setting provided with a smoke chamber, and an arch arranged above said smoke chamber and having upper and lower arched portions adapted to direct substantially equal proportions of the prod ucts of combustion respectively into the upper and lower rows of tubes.

2. In a device of the class described, a boiler having tubes, a boiler setting provided with a smoke chamber and an arch sustained above said chamber and having upper and lower arched portions designed to direct substantially equal proportions of the products of combustion respectively into the upper and lower rows of tubes, the line of juncture of said arched portions being disposed in a plane common with the plane of the central horizontal row of tubes.

3. In a device of the class described, a reararch for boilers comprising a plurality of arch bars having horizontal portions and vertical flanges, said flanges being pierced by a series of transverse perforations arranged at spaced intervals and the horizontal portions of the bars having their edges notched at intervals, and masonry sustained by the bars.

4. In a device of the class described, a reararch for boilers comprising a plurality of arch bars of compound curvature from end to end and having horizontal supporting por tions and a plurality of blocks designed to seat between the bars and having their lower faces of compound curvature to conform to and fit upon the horizontal supporting portions of the bars.

5. In a device of the class described, a reararch forboilers comprising a plurality of individual blocks arranged side by side, a plurality of arch bars arranged for supporting said blocks and having vertical webs to pro ject upward between the latter and horizontal flanges on which the blocks rest, said. bars being of compound curvature from end to end and the blocks having their lower faces -of compound curvature to conform to and fit upon the horizontal flanges, and means for sustaining the bars.

In testimony whereof, I affix my signature in presence of two witnesses.

CHAS. B. RISLEY.

itnesses N. T. RAGLAND, HENRY C. BARR. 

